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A Method for Active Space Charge Neutralization in an Inertial Electrostatic Confinement (IEC) Nuclear Fusion Device

2017
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Release : 2017
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Book Synopsis A Method for Active Space Charge Neutralization in an Inertial Electrostatic Confinement (IEC) Nuclear Fusion Device by : Brendan Sporer

Download or read book A Method for Active Space Charge Neutralization in an Inertial Electrostatic Confinement (IEC) Nuclear Fusion Device written by Brendan Sporer. This book was released on 2017. Available in PDF, EPUB and Kindle. Book excerpt: Recent inertial electrostatic confinement (IEC) fusion concepts are discussed and their shortcomings noted. Ion space charge is substantiated as a significant hindrance to high efficiencies, so a method for space charge neutralization in an ion-injected IEC device is proposed. An electrostatically- plugged magnetic trap is used to confine electrons in the core region of a planar electrostatic trap for ions. The electrons act to dynamically neutralize the space charge created by converging ions for the purpose of increasing achievable core density and fusion rates. An electrostatic trap utilizing this method of neutralization is termed the plasma-core planar electrostatic trap, or PCPET. COMSOL Multiphysics 4.3 is used to model the electromagnetic fields of the PCPET and compute lone ion and electron trajectories within them. In the proper configuration, ions are shown to be stably confined in the trap for many hundreds of oscillations, potentially much longer. Electrons are confined virtually infinitely in the central electrostatically-plugged cusp. For both species, upscatter into source electrodes seems to be the dominant loss mechanism. Adjusting the electron energy and behavior in the core to provide the optimum neutralization for ions is discussed. Ion synchronization behavior can be controlled with RF signals applied to the anode. Two operational modes are identified and discriminated by the state of ion synchronization. Further experimentation is needed to determine which mode produces the optimal neutralization and fusion rate. An experimental prototype PCPET is constructed out of 3D-printed PLA and machined aluminum.

Performance Impact of Ion Sources in Inertial Electrostatic Confinement Devices

2020
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Release : 2020
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Book Synopsis Performance Impact of Ion Sources in Inertial Electrostatic Confinement Devices by : Alexandru D. Calburean

Download or read book Performance Impact of Ion Sources in Inertial Electrostatic Confinement Devices written by Alexandru D. Calburean. This book was released on 2020. Available in PDF, EPUB and Kindle. Book excerpt: In order to improve the performance of Inertial Electrostatic Confinement (IEC) based fusion devices, so as to improve their effectiveness as low cost, portable neutron sources, a novel use of ion sources is proposed as a means of increasing fusion reaction rate at similar power levels. This paper aims to determine the success and practicality of the proposed use type for ion sources and characterize the IEC device in question, in terms of performance, and neutron emission. The application outlined aims to improve upon the performance of IEC devices with an anode layer ion source. The above-mentioned approach was evaluated by first conditioning the IEC fusion device in question. Then a neutron flux baseline was recorded as a metric for performance, and to evaluate the assumption of neutron emission isotropy in the device. Then an ion source was installed in the chamber, and the system was once again conditioned in the same manner. A similar baseline reading and analysis was done to ensure a correct comparison could be made between performance with the ion source turned on and off. Next the system was run with the ion source at full power to allow for further characterization of the performance and stability of the device. Finally, a last run was carried out with the ion source properly tuned, and results were compared to both baseline runs. It has been shown that there is a potential performance gain from operation with an ion source, both in terms of system stability and improved neutron emission. Across all run campaigns, the assumption of isotropic emission was shown to be a poor representation of the actual emission. With a higher degree of certainty, it has been shown that operation with an ion source serves to reliably exaggerate the anisotropy found in baseline campaigns.

Instability Studies on a Spherical Inertial Electrostatic Confinement

2006
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Release : 2006
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Book Rating : 255/5 ( reviews)

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Book Synopsis Instability Studies on a Spherical Inertial Electrostatic Confinement by : Hyung Jin Kim

Download or read book Instability Studies on a Spherical Inertial Electrostatic Confinement written by Hyung Jin Kim. This book was released on 2006. Available in PDF, EPUB and Kindle. Book excerpt: The spherical inertial electrostatic confinement concept offers an alternative fusion plasma confinement scheme, where charged particles are accelerated and confined electrostatically with a series of biased spherical concentric electrodes. The inertia of the accelerated ions compresses the ions and builds up the space charge at the center of the cathode grid. The space charge of the ions attracts electrons which in turn accumulate a space charge. The accumulation of collective space charge creates a series of deep "virtual" electrostatic potential wells which confine and concentrate ions into a small volume where an appreciable number of nuclear fusion reactions could occur. It is very attractive for a power plant due to its mechanical simplicity and high power-to-mass ratio. However, its beam-plasma interactions are not clearly understood.

Inertial-electrostatic Confinement (IEC) for Space Propulsion and Power

2000
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Release : 2000
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Book Synopsis Inertial-electrostatic Confinement (IEC) for Space Propulsion and Power by : J. Nadler

Download or read book Inertial-electrostatic Confinement (IEC) for Space Propulsion and Power written by J. Nadler. This book was released on 2000. Available in PDF, EPUB and Kindle. Book excerpt:

The Production of 13N from Inertial Electrostatic Confinement Fusion

2003
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Release : 2003
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Book Synopsis The Production of 13N from Inertial Electrostatic Confinement Fusion by : John W. Weidner

Download or read book The Production of 13N from Inertial Electrostatic Confinement Fusion written by John W. Weidner. This book was released on 2003. Available in PDF, EPUB and Kindle. Book excerpt:

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